OpenAI Realtime API vs LiveKit for Enterprise Voice

<p>Everyone evaluating AI avatar platforms focuses on voice quality. The bigger UX killer is almost always latency — and it's a harder problem than picking a good TTS

<p>Most developers underestimate how hard voice AI actually is.</p> <p>To build a production-ready calling agent, you need to integrate:</p> <p>– SIP signalling</p> <p>– Real-time

<h2> TL;DR </h2> <p>OpenAI offers two WebSocket API modes for different use cases: the <strong>Responses API WebSocket mode</strong> for agentic workflows with heavy tool calling

<p>Most AI tutors today feel like glorified chatbots with a text-to-speech layer slapped on top. But what if students could actually <em>talk</em> to their tutor, pause

<p>Adding voice messages to an AI companion is one of those features that sounds simple until you try to ship it. "Just use a TTS API and send the audio" -sure, in theory. In

<p>GPT-5.4 shipped on March 5. Seven weeks later, on April 23, 2026, OpenAI released GPT-5.5 — and the pace alone tells you something about where this race is headed. This isn't

<p>Most voice agents decide you are done talking by measuring silence. Voice activity detection flags the audio as speech or not speech, a timer runs during the not-speech, and

<p>Vertex AI has been Google Cloud's AI development platform since 2021. On April 22, 2026, at Google Cloud Next in Las Vegas, Google retired it — not with a deprecation notice,